#
# OpenLookup - entry.py
#
# Copyright 2008 Ken Rimey
#

# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

from google.appengine.ext import db

VALUE_SIZE = 1024

def check_size(n, name):
    def check(s):
        if s is None:
            raise ValueError('Got None instead of string for %s.' % name)

        if len(s) > n:
            raise ValueError('Length of %s exceeds %d bytes.' % (name, n))

    return check

class Entry(db.Model):
    key_hash = db.StringProperty(validator=check_size(40, 'key'))
    value = db.BlobProperty(validator=check_size(VALUE_SIZE, 'value'))

    # The placemark is the value hash (40 hex digits) concatenated
    # with the secret hash (40 hex digits or empty).
    placemark = db.StringProperty(validator=check_size(80, 'placemark'))
    expiration = db.IntegerProperty()
